The Scale of the Universe 2
htwins.net/scale2
Interactive visualization comparing the sizes of everything in the universe — from quantum foam to the observable universe — on a continuous scrollable scale.
The Scale of the Universe 2 is an interactive zoom through the sizes of things, from the smallest known particles to the whole observable universe. You scroll or use the slider, and click objects to read short facts about them as the scale changes.
It was created by Cary Huang and later ported to Pixi.js by Matthew Martori, and it was inspired by an earlier cell-size tool from the University of Utah. It is available in many languages. This is the second version of the original project, which is listed separately.
Why it is useful
Scale of the Universe makes the numerical distances between orders of magnitude viscerally comprehensible in a way text descriptions cannot. Scrolling from a proton to a galaxy cluster in a single continuous motion creates genuine cognitive impact.
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